CN114966573A - Channel interference signal identification guiding system and method - Google Patents
Channel interference signal identification guiding system and method Download PDFInfo
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01S—RADIO DIRECTION-FINDING; RADIO NAVIGATION; DETERMINING DISTANCE OR VELOCITY BY USE OF RADIO WAVES; LOCATING OR PRESENCE-DETECTING BY USE OF THE REFLECTION OR RERADIATION OF RADIO WAVES; ANALOGOUS ARRANGEMENTS USING OTHER WAVES
- G01S7/00—Details of systems according to groups G01S13/00, G01S15/00, G01S17/00
- G01S7/02—Details of systems according to groups G01S13/00, G01S15/00, G01S17/00 of systems according to group G01S13/00
- G01S7/36—Means for anti-jamming, e.g. ECCM, i.e. electronic counter-counter measures
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01S—RADIO DIRECTION-FINDING; RADIO NAVIGATION; DETERMINING DISTANCE OR VELOCITY BY USE OF RADIO WAVES; LOCATING OR PRESENCE-DETECTING BY USE OF THE REFLECTION OR RERADIATION OF RADIO WAVES; ANALOGOUS ARRANGEMENTS USING OTHER WAVES
- G01S7/00—Details of systems according to groups G01S13/00, G01S15/00, G01S17/00
- G01S7/02—Details of systems according to groups G01S13/00, G01S15/00, G01S17/00 of systems according to group G01S13/00
- G01S7/41—Details of systems according to groups G01S13/00, G01S15/00, G01S17/00 of systems according to group G01S13/00 using analysis of echo signal for target characterisation; Target signature; Target cross-section
- G01S7/415—Identification of targets based on measurements of movement associated with the target
Abstract
The invention discloses a channel interference signal identification guiding system and a method, comprising the following steps of S100: receiving all suspicious echo signals in the target detection area, and carrying out preliminary inspection and troubleshooting on whether the radar equipment is subjected to deceptive interference in the target detection area; step S200: performing deception jamming preliminary judgment on all suspicious echo signals based on the distribution information of the suspicious echo signals on a two-dimensional plane; step S300: respectively searching for an indicative index of positive correlation fixed accompanying connection or negative correlation fixed accompanying connection with each detection target; step S400: verifying the deceptive interference influence of the echo signals based on the accompanying conditions of the indicative indexes of the corresponding targets; step S500: correspondingly acquiring state data of the radar equipment when the radar equipment receives the echo signals, acquiring the influence range of the interference signals based on the state data of the radar equipment, and feeding back and reminding an operator to adjust detection parameters of the radar equipment.
Description
Technical Field
The invention relates to the technical field of radar interference signal identification, in particular to a channel interference signal identification guiding system and a channel interference signal identification guiding method.
Background
The deceptive jamming exists in the radar jamming, which means that parameters of a received radar echo signal are changed, or false target echoes are manufactured, the radar which receives the echo signal is induced to understand wrongly or use the signal, and the purpose of disturbing radar detection and target tracking is achieved.
The real radar echo signals and the false radar echo signals have high similarity, which is a technical difficulty in distinguishing the true radar echo signals from the false radar echo signals; however, if an enemy intentionally increases the deceptive interference when the radar detects a target, the enemy always has some regularity when the enemy increases the interference to the radar device, because the enemy always makes the detecting radar detect false signals as much as possible, and the information dimensions of the real radar echo signal and the false radar echo signal in the time domain and the frequency domain are different.
Disclosure of Invention
The present invention is directed to a system and method for identifying and guiding a channel interference signal, so as to solve the problems in the prior art.
In order to solve the technical problems, the invention provides the following technical scheme: a channel interference signal identification guiding method comprises the following steps:
step S100: controlling the scout car, performing suspicious target detection on a target detection area by using radar equipment on the scout car, receiving all suspicious echo signals in the target detection area, and performing preliminary inspection and investigation on whether the radar equipment is subjected to deceptive interference in the target detection area based on state data of the radar equipment; if the preliminary inspection and the investigation result show that the radar equipment is subjected to deceptive interference in the target detection area, turning to the step S200;
step S200: performing preliminary judgment of deceptive interference on all suspicious echo signals based on the distribution information of the suspicious echo signals on the two-dimensional plane respectively to obtain echo signals with deceptive interference influence and echo signals without deceptive interference influence respectively, and turning to the step S300;
step S300: analyzing historical detection data of radar equipment, and respectively searching for indicative indexes of positive correlation fixed accompanying connection or negative correlation fixed accompanying connection existing between the radar equipment and each detection target; the indicative indexes which are in positive correlation and fixed accompanying connection with the detection targets refer to characteristic environment indexes matched with the detection targets; the indicative indexes which are in negative correlation and fixed accompanying connection with the detection targets refer to characteristic environment indexes which are not matched with the detection targets;
step S400: processing and identifying a plurality of echo signals with the deceptive interference influence detected in the step S200 to obtain target information corresponding to each echo signal; the target information comprises target category information, target-to-radar distance information, target radial speed information, target azimuth information and target height information; verifying the deceptive interference influence of the echo signals based on the accompanying conditions of the indicative indexes of the corresponding targets;
step S500: collecting the echo signals which are actually influenced by the deceptive interference and displayed by the verification result, correspondingly acquiring state data of the radar equipment when the echo signals are received, acquiring the influence range of the interference signals based on the state data of the radar equipment, and feeding back and reminding an operator to adjust the detection parameters of the radar equipment or adjust the reconnaissance path of the reconnaissance vehicle.
Further, the step S100 of performing preliminary check and troubleshooting on whether the radar device is fraudulently interfered in the target detection area based on the state data of the radar device includes:
step S101: acquiring all target echo signals received by radar equipment in a target detection area, and regarding all the target echo signals as suspicious echo signals; sequencing all suspicious echo signals according to echo receiving time to obtain a sequence set { t ] when receiving echoes 1 ,t 2 ,…,t n The corresponding suspicious echo signal ordered set { S } 1 ,S 2 ,…,S n }; wherein S is 1 ,S 2 ,…,S n Respectively indicating radar devices at t 1 ,t 2 ,…,t n At the receiving time, the 1 st suspicious echo signal, the 2 nd suspicious echo signal, the … th suspicious echo signal and the n th suspicious echo signal are received; calculating the average target detection rate of the radar equipment in the target detection area:
step S102: respectively and correspondingly acquiring state data US of radar equipment on the scout car when the ith suspicious echo signal is obtained i (ii) a Status data US i The method comprises the steps of scanning angle information of radar antenna beams when the radar equipment receives an ith suspicious echo signal, and position information of a scout car when the radar equipment receives the ith suspicious echo signal; respectively acquiring the sequence set S of suspicious echo signals 1 ,S 2 ,…,S n Within }, the state change data US corresponding to each two adjacent suspicious echo signals i -US i-1 (ii) a Calculating an average rate of change of state of the radar device within the target detection area:
calculating an average concomitant target detection rate obtained as the radar average device detection state changes:
P 3 ＝P 2 /P 1
step S103: when the obtained average target detection rate P 1 Greater than the average target detection rate threshold preset by the system and average associated target detection rate P 3 If the detection rate is larger than the average accompanying target detection rate threshold preset by the system, the preliminary detection and investigation result is judged to be that the radar equipment is subjected to deceptive interference in the current target detection area;
the introduced average target detection rate, the average state change rate and the average accompanying target detection rate are used for carrying out preliminary analysis on the environment of radar detection target echoes; considering that if an enemy intentionally increases deception interference when the radar detects a target, the interference on the radar equipment is always regular, and the enemy always allows the detecting radar to detect false signals as much as possible, and at the moment, if the radar continuously changes the detection state, the frequency of the detected target echo is high, two possibilities exist, namely, the radar detects correctly, and a plurality of detected targets really exist in the detection environment where the current radar is located; secondly, the radar detection has the phenomenon of over-high false alarm rate, namely, the detection environment where the current radar is located has deceptive interference influence.
Further, the preliminary judgment process of performing deceptive jamming on all suspicious echo signals in step S200 includes:
step S201: respectively acquiring all suspicious echo signals received by radar equipment in a target detection area, respectively taking a signal data point of each suspicious echo signal as a starting point, and respectively dividing each suspicious echo signal into a plurality of data sections with the length equal to the width of a radar emission pulse;
step S202: respectively calculating an information dimension x in each data segment in each suspicious echo signal, respectively calculating an information dimension y of a signal envelope of each data segment in each suspicious echo signal, and acquiring a difference value R between the two information dimensions y-x; obtaining the maximum R value obtained when the target echo exists independently and no interference echo exists from the historical detection data of the radar equipment, and recording the maximum R value as R max Satisfy μ>R max Setting an interference detection threshold mu;
step S203: when a certain suspicious echo signal R is greater than mu, preliminarily judging that deceptive interference exists in the certain suspicious echo signal; when a certain suspicious echo signal R is less than or equal to mu, preliminarily judging that no deceptive interference exists in the certain suspicious echo signal;
step S204: finishing preliminary judgment of the deception jamming influence on all suspicious echo signals, classifying all suspicious echo signals, and respectively obtaining echo signals with the deception jamming influence and echo signals without the deception jamming influence;
the step is to distinguish by using the difference of the deception jamming and the target echo in the information dimension, and further judge whether the radar is subjected to the deception jamming in the step S100, so that the accuracy of jamming identification is improved; the characteristics that the difference value of two information dimensions of a deception jamming signal is large, and the difference value of two information dimensions of noise and a target echo is small are utilized to judge and analyze whether the deception jamming exists.
Further, the step S300 of analyzing the historical detection data of the radar device and respectively finding the indicative index of the positive or negative correlation fixed incidental relationship with each detection target includes:
step S301: acquiring an accompanying characteristic environment index of radar equipment when a certain target a is detected historically; companion feature environment indicator containing set of items { r 1 ,r 2 ,r 3 ,r 4 ,r 5 B, }; wherein r is 1 The altitude range of the terrain in which a is positioned; r is a radical of hydrogen 2 Is the building facility attribute within the distance threshold range from a; r is 3 Is the attribute of the moving object within the range of the distance threshold value from a; r is 4 Is the landform of the area where a is located; r is a radical of hydrogen 5 The climate of the area where a is located;
step S302: in the radar equipment historical detection record, a target a and a jth accompanying characteristic environment index r j The combination occurs as an independent instance { a, r } j }; wherein r is j ∈{r 1 ,r 2 ,r 3 ,r 4 ,r 5 B, }; calculate each independent instance { a, r } j Frequency of occurrence
Wherein, N { a, r j Indicates the target a and the j-th adjoint characteristic environment index r j The total number of instances of independent instances that occur in combination; n is a radical of a Representing the total number of times of detecting the object a in the radar device historical detection record;
step S303: in the historical detection record of the radar equipment, the target a is detected and the detection result is displayed to be correct, and the jth accompanying characteristic environment index r j Cases occurring in combination as an independent instance { a, r j True }; calculate each independent instance { a, r } j Frequency of occurrence of true }:
wherein N { a, t } represents the total number of instances of the independent instance { a, t }; n is a radical of a Representing the total number of times of detecting the object a in the radar device historical detection record;
step S304: computing independent cases { a, r j And independent cases { a, r } j Value of the companion relationship between true }:
wherein N [ { a, rj }. U { a, r }, is j ,true}]Represents the independent case { a, rj } and the independent case { a, r } j True } total number of co-occurrences; if it is
Judging that no fixed accompanying relation exists between the independent case { a, r, t } and the independent case { a, r }, if so
Determine independent instances { a, r j And independent cases { a, r } j True } there is a positive correlation fixed association, i.e. whenever the object a is detected, the characteristic environment index r associated with the object a appears j Indicating indexes for displaying correct detection results; if it is
Judging independent case { a, r j And independent cases { a, r } j True } there is a fixed association of negative correlation, i.e. whenever an object a is detected, a characteristic environment indicator r associated with the object a appears j Indicating indexes for displaying detection result errors;
the steps are to analyze whether deception jamming exists in the echo signals from the actual environment characteristic environment, because the deception jamming often changes the parameters of the received radar echo signals or makes false target echoes, targets corresponding to actually generated false echo signals are different from targets corresponding to actual echo signals, and the analyzed false targets may have the situation of being not adapted to the environment on the environment characteristics, and the steps can realize effect identification on the deception jamming signals which are not enough to be falsified.
Further, the step S400 of performing a verification process of the deceptive jamming influence on the plurality of echo signals based on the accompanying situation of the indicative index of each corresponding target includes:
step S401: determining specific positions corresponding to the targets in a target detection area based on target information corresponding to the suspicious echo signals, and respectively acquiring accompanying characteristic environment indexes of the targets at the specific positions;
step S402: if an indicative index presenting a negative correlation fixed incidental relation with the accompanying characteristic environment index of a certain target at a specific position or an indicative index not presenting a positive correlation fixed incidental relation with the accompanying characteristic environment index of the certain target, the verification result shows that the suspicious echo signal corresponding to the certain target really has a deceptive jamming influence.
Further, step S500 includes:
step S501: respectively acquiring a plurality of corresponding state data when the radar equipment receives an echo signal which is shown by a verification result and really has a deceptive interference influence; based on the plurality of state data, acquiring a scanning angle range of a radar antenna beam and a position range of a scout car when the radar equipment receives an echo signal which shows that the check result really has the deceptive interference influence;
step S502: and feeding back the scanning angle range of the radar antenna beam and the spatial region range formed by the position range of the reconnaissance vehicle to an operator, reminding the operator to reconnaissance the spatial region range again, and adjusting the detection parameters of the radar equipment before reconnaissance again.
In order to better implement the method, a channel interference signal identification guiding system is further provided, and the system comprises: the device comprises a suspicious echo signal receiving module, a deceptive interference preliminary examination and troubleshooting module, a deceptive interference preliminary judgment module, a historical detection data analysis module, a deceptive interference influence verification module and a guide feedback module;
the suspicious echo signal receiving module is used for controlling the scout car, detecting suspicious targets in the target detection area by utilizing the radar equipment on the scout car and receiving all suspicious echo signals in the target detection area;
the system comprises a deceptive interference preliminary inspection and troubleshooting module, a data acquisition module and a data processing module, wherein the deceptive interference preliminary inspection and troubleshooting module is used for acquiring state data of the radar equipment and preliminarily inspecting and troubleshooting whether the radar equipment is deceptive interfered in a target detection area;
the deception jamming preliminary judgment module is used for receiving the data in the suspicious echo signal receiving module and carrying out preliminary judgment on deception jamming on all suspicious echo signals based on the distribution information of the suspicious echo signals on the two-dimensional plane;
the historical detection data analysis module is used for analyzing the historical detection data of the radar equipment and respectively searching for an indicative index of positive correlation fixed accompanying connection or negative correlation fixed accompanying connection existing between the historical detection data and each detection target; the indicative indexes which are in positive correlation and fixed accompanying connection with the detection targets refer to characteristic environment indexes matched with the detection targets; the indicative indexes which are in negative correlation and fixed accompanying connection with the detection targets refer to characteristic environment indexes which are not matched with the detection targets;
the deception jamming influence checking module is used for receiving the data in the deception jamming preliminary judgment module, processing and identifying a plurality of echo signals with deception jamming influences detected out to obtain target information corresponding to each echo signal; acquiring accompanying conditions of a plurality of echo signals based on indicative indexes of respective corresponding targets, and verifying the influence of deceptive interference;
and the guiding feedback module is used for receiving the data in the deception interference influence checking module, collecting the echo signals of which the checking results show that the deception interference influence really exists, correspondingly acquiring the state data of the radar equipment when receiving the echo signals, acquiring the influence range of the interference signals based on the state data of the radar equipment, and feeding back and reminding an operator to adjust the detection parameters of the radar equipment or adjust the reconnaissance path of the reconnaissance car.
Furthermore, the suspicious echo signal receiving module comprises a first calculating unit, a second calculating unit and a third calculating unit;
a first calculation unit configured to calculate an average target detection rate of the radar device in a target detection area;
a second calculation unit that calculates an average rate of change of state of the radar device within the target detection area;
and a third calculation unit for calculating an average accompanying target detection rate obtained as the radar averaging device detection state changes.
Furthermore, the historical detection data analysis module comprises an accompanying relation value calculation unit and an indicative index analysis unit;
the accompanying relation value calculating unit is used for calculating an accompanying relation value between each detection target and each accompanying characteristic environment index and judging a fixed accompanying relation between each detection target and each accompanying characteristic environment index according to the accompanying relation value;
and the indicative index analyzing unit is used for receiving the data in the accompanying connection value calculating unit to obtain a plurality of indicative indexes which are in positive correlation fixed accompanying connection with each detection target and a plurality of indicative indexes which are in negative correlation fixed accompanying connection with each detection target.
Compared with the prior art, the invention has the following beneficial effects: when judging whether an echo signal received by a radar is influenced by a deception jamming signal, firstly, detecting the frequency analysis of a target echo from radar equipment, then, analyzing the state change frequency when the radar equipment detects the target echo, if the radar equipment detects that the frequency of the target echo is high and the state change frequency when the radar detects the target echo is also high, namely, the probability of the radar equipment under the deception jamming deployment and control environment of an enemy is also high in the current radar detection environment, then, analyzing the information dimensions of the signal on a time domain and a frequency domain, setting a detection threshold, and preliminarily screening the radar echo with deception jamming; the invention also checks the adaptation between the target analyzed by the radar echo and the environmental characteristic of the target, and improves the scientificity and maneuverability of the system for identifying the deceptive interference as further checking the deceptive interference analysis result.
Drawings
The accompanying drawings, which are included to provide a further understanding of the invention and are incorporated in and constitute a part of this specification, illustrate embodiments of the invention and together with the description serve to explain the principles of the invention and not to limit the invention. In the drawings:
fig. 1 is a flow chart of a channel interference signal identification guiding method according to the present invention;
fig. 2 is a schematic structural diagram of a channel interference signal identification guidance system according to the present invention.
Detailed Description
The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
Referring to fig. 1-2, the present invention provides a channel interference signal identification guiding method, which includes:
step S100: controlling the scout car, performing suspicious target detection on a target detection area by using radar equipment on the scout car, receiving all suspicious echo signals in the target detection area, and performing preliminary inspection and investigation on whether the radar equipment is subjected to deceptive interference in the target detection area based on state data of the radar equipment; if the preliminary inspection and the investigation result show that the radar equipment is subjected to deceptive interference in the target detection area, turning to the step S200;
the process of preliminarily checking and troubleshooting whether the radar equipment is subjected to deceptive interference in the target detection area or not based on the state data of the radar equipment comprises the following steps:
step S101: acquiring all target echo signals received by radar equipment in a target detection area, and regarding all the target echo signals as suspicious echo signals; all suspicious echo signals are sent toSorting according to the receiving time of the echo to obtain a sequence set { t) when receiving the echo 1 ,t 2 ,…,t n The corresponding suspicious echo signal ordered set { S } 1 ,S 2 ,…,S n }; wherein S is 1 ,S 2 ,…,S n Respectively indicating radar devices at t 1 ,t 2 ,…,t n Receiving 1 st, 2 nd, … th and n th suspicious echo signals at the time of receiving; calculating the average target detection rate of the radar equipment in the target detection area:
step S102: respectively and correspondingly acquiring state data US of radar equipment on the scout car when the ith suspicious echo signal is obtained i (ii) a Status data US i The method comprises the steps of scanning angle information of radar antenna beams when the radar equipment receives an ith suspicious echo signal, and position information of a scout car when the radar equipment receives the ith suspicious echo signal; respectively acquiring the sequence set S of suspicious echo signals 1 ,S 2 ,…,S n Within }, the state change data US corresponding to each two adjacent suspicious echo signals i -US i-1 (ii) a Calculating an average rate of change of state of the radar device within the target detection area:
calculating an average concomitant target detection rate obtained as the radar average device detection state changes:
P 3 ＝P 2 /P 1
step S103: when the obtained average target detection rate P 1 Greater than the average target detection rate threshold preset by the system and average associated target detection rate P 3 If the detection rate is larger than the average accompanying target detection rate threshold preset by the system, the preliminary detection and investigation result is judged to be that the radar equipment is subjected to deceptive interference in the current target detection area;
step S200: performing preliminary judgment of deceptive interference on all suspicious echo signals based on distribution information of the suspicious echo signals on a two-dimensional plane, respectively obtaining echo signals with deceptive interference influence and echo signals without deceptive interference influence, and turning to the step S300;
the primary judgment process for carrying out deceptive jamming on all suspicious echo signals comprises the following steps:
step S201: respectively acquiring all suspicious echo signals received by radar equipment in a target detection area, respectively taking a signal data point of each suspicious echo signal as a starting point, and respectively dividing each suspicious echo signal into a plurality of data sections with the length equal to the width of a radar emission pulse;
step S202: respectively calculating an information dimension x in each data segment in each suspicious echo signal, respectively calculating an information dimension y of a signal envelope of each data segment in each suspicious echo signal, and acquiring a difference value R between the two information dimensions y-x; obtaining the maximum R value obtained when the target echo exists independently and no interference echo exists from the historical detection data of the radar equipment, and recording the maximum R value as R max Satisfy mu>R max Setting an interference detection threshold mu;
step S203: when a certain suspicious echo signal R is greater than mu, preliminarily judging that deceptive interference exists in the certain suspicious echo signal; when a certain suspicious echo signal R is less than or equal to mu, preliminarily judging that no deceptive interference exists in the certain suspicious echo signal;
for example, in the historical detection data of the radar device, when the maximum R value obtained when the target echo exists alone and the interference echo does not exist is 0.1567, R is max 0.1567, so μ can be 0.1568; when a suspicious echo signal R>0.1568, preliminarily determining whether a spoofing interference exists in a certain suspected echo signal; when a certain suspicious echo signal R is less than or equal to 0.1568, preliminarily judging that no deceptive interference exists in the certain suspicious echo signal;
step S204: finishing preliminary judgment of the deception jamming influence on all suspicious echo signals, classifying all suspicious echo signals, and respectively obtaining echo signals with the deception jamming influence and echo signals without the deception jamming influence;
step S300: analyzing historical detection data of the radar equipment, and respectively searching for an indicative index of positive correlation fixed accompanying connection or negative correlation fixed accompanying connection existing between the radar equipment and each detection target; the indicative indexes which are in positive correlation and fixed accompanying connection with the detection targets refer to characteristic environment indexes matched with the detection targets; the indicative indexes which are in negative correlation and fixed accompanying connection with the detection targets refer to characteristic environment indexes which are not matched with the detection targets;
the process of analyzing historical detection data of the radar equipment and respectively searching for the indicative indexes of positive correlation fixed accompanying connection or negative correlation fixed accompanying connection existing between the historical detection data and each detection target comprises the following steps:
step S301: acquiring an accompanying characteristic environment index when a certain target a is detected by radar equipment in a historical manner; companion feature environment indicator containing set of items { r 1 ,r 2 ,r 3 ,r 4 ,r 5 B, }; wherein r is 1 The altitude range of the terrain in which a is located; r is 2 Is the building facility attribute within the distance threshold range from a; r is 3 Is the attribute of the moving object within the range of the distance threshold value from a; r is 4 Is the landform of the area where a is located; r is 5 The climate of the area where a is located;
step S302: in the radar equipment historical detection record, a target a and a jth accompanying characteristic environment index r j The combination occurs as an independent instance { a, r } j }; wherein r is j ∈{r 1 ,r 2 ,r 3 ,r 4 ,r 5 B, }; calculate each independent instance { a, r } j Frequency of occurrence
Wherein, N { a, r j Indicates the target a and the j-th adjoint characteristic environment index r j The total number of instances of independent instances that occur in combination; n is a radical of a Representing the total number of times of detecting the object a in the radar device historical detection record;
step S303: in the historical detection record of the radar equipment, the target a is detected and the detection result is displayed to be correct, and the jth accompanying characteristic environment index r j Cases occurring in combination as an independent instance { a, r j True }; calculate each independent instance { a, r } j True } frequency of occurrence:
wherein N { a, t } represents the total number of instances of the independent instance { a, t }; n is a radical of a Representing the total number of times of detecting the object a in the radar device historical detection record;
step S304: computing independent cases { a, r j And independent cases { a, r } j Value of the companion relationship between true }:
wherein, N [ { a, r j }∪{a,r j ,true}]Representing independent instances { a, r j And independent cases { a, r } j True } total number of co-occurrences; if it is
Judging that no fixed accompanying relation exists between the independent case { a, r, t } and the independent case { a, r }, if so
Determine independent instances { a, r j And independent cases { a, r } j True } there is a positive correlation fixed association, i.e. whenever the object a is detected, the characteristic environment index r associated with the object a appears j Indicating indexes for displaying correct detection results; if it is
Judging independent cases { a, r } j And independent cases { a, r } j Fixed companion links with negative correlation between true }, i.e. whenever probedOut of the target a, a characteristic environment index r associated with the target a appears j Indicating indexes for displaying detection result errors;
step S400: processing and identifying a plurality of echo signals with the deceptive interference influence detected in the step S200 to obtain target information corresponding to each echo signal; the target information comprises target category information, target-to-radar distance information, target radial speed information, target azimuth information and target height information; verifying the deceptive interference influence of a plurality of echo signals based on the accompanying conditions of the indicative indexes of the respective corresponding targets;
for example, the target a is a communication base station, and the communication base station and the accompanying characteristic environment index: the building facility attribute is that negative correlation fixed accompanying connection exists between the radar stations, so when a target is detected to be displayed as a communication base station, and if the radar base station exists within the range of 1.6 kilometers of the target, the influence of deceptive interference on a radar echo signal of the communication base station displayed as the detected target is judged, and the detection result is wrong;
the verifying process for the deceptive interference influence of the plurality of echo signals based on the accompanying conditions of the indicative indexes of the corresponding targets comprises the following steps:
step S401: determining specific positions corresponding to the targets in a target detection area based on target information corresponding to the suspicious echo signals, and respectively acquiring accompanying characteristic environment indexes of the targets at the specific positions;
step S402: if an indicative index presenting a negative correlation fixed incidental relation with the target or an indicative index not presenting a positive correlation fixed incidental relation with the target appears in the incidental characteristic environment indexes of the target at the specific position, the verification result shows that the deceptive interference influence really exists in the suspicious echo signal corresponding to the target;
step S500: collecting the echo signals which are actually influenced by the deceptive interference and displayed by the verification result, correspondingly acquiring state data of the radar equipment when the echo signals are received, acquiring the influence range of the interference signals based on the state data of the radar equipment, and feeding back and reminding an operator to adjust the detection parameters of the radar equipment or adjust the reconnaissance path of the reconnaissance vehicle.
Wherein, step S500 includes:
step S501: respectively acquiring a plurality of corresponding state data when the radar equipment receives an echo signal which is shown by a verification result and really has a deceptive interference influence; based on the plurality of state data, acquiring a scanning angle range of a radar antenna beam and a position range of a scout car when the radar equipment receives an echo signal which shows that the check result really has the deceptive interference influence;
step S502: and feeding back the scanning angle range of the radar antenna beam and the spatial region range formed by the position range of the reconnaissance vehicle to an operator, reminding the operator to reconnaissance the spatial region range again, and adjusting the detection parameters of the radar equipment before reconnaissance again.
In order to better implement the method, a channel interference signal identification guiding system is further provided, and the system comprises: the device comprises a suspicious echo signal receiving module, a deceptive interference preliminary examination and troubleshooting module, a deceptive interference preliminary judgment module, a historical detection data analysis module, a deceptive interference influence verification module and a guide feedback module;
the suspicious echo signal receiving module is used for controlling the scout car, detecting suspicious targets in the target detection area by utilizing the radar equipment on the scout car and receiving all suspicious echo signals in the target detection area;
the suspicious echo signal receiving module comprises a first calculating unit, a second calculating unit and a third calculating unit;
a first calculation unit configured to calculate an average target detection rate of the radar device in a target detection area;
a second calculation unit that calculates an average rate of change of state of the radar device within the target detection area;
a third calculation unit for calculating an average accompanying target detection rate obtained as the radar averaging device detection state changes;
the initial detection and investigation module is used for acquiring state data of the radar equipment and performing initial detection and investigation on whether the radar equipment is subjected to the deceptive interference in the target detection area;
the deception jamming preliminary judgment module is used for receiving the data in the suspicious echo signal receiving module and carrying out preliminary deception jamming judgment on all the suspicious echo signals based on the distribution information of the suspicious echo signals on a two-dimensional plane;
the historical detection data analysis module is used for analyzing the historical detection data of the radar equipment and respectively searching for an indicative index of positive correlation fixed accompanying connection or negative correlation fixed accompanying connection existing between the historical detection data and each detection target; the indicative indexes which are in positive correlation and fixed accompanying connection with the detection targets refer to characteristic environment indexes matched with the detection targets; the indicative indexes which are in negative correlation and fixed accompanying connection with the detection targets refer to characteristic environment indexes which are not matched with the detection targets;
the historical detection data analysis module comprises an accompanying relation value calculation unit and an indicative index analysis unit;
the accompanying relation value calculating unit is used for calculating an accompanying relation value between each detection target and each accompanying characteristic environment index and judging a fixed accompanying relation between each detection target and each accompanying characteristic environment index according to the accompanying relation value;
the indicative index analyzing unit is used for receiving the data in the accompanying connection value calculating unit to obtain a plurality of indicative indexes which are in positive correlation fixed accompanying connection with each detection target and a plurality of indicative indexes which are in negative correlation fixed accompanying connection with each detection target;
the deception jamming influence checking module is used for receiving the data in the deception jamming preliminary judgment module, processing and identifying a plurality of echo signals with deception jamming influences detected out to obtain target information corresponding to each echo signal; acquiring accompanying conditions of a plurality of echo signals based on indicative indexes of respective corresponding targets, and verifying the deceptive interference influence;
and the guiding feedback module is used for receiving the data in the deception interference influence checking module, collecting the echo signals of which the checking results show that the deception interference influence really exists, correspondingly acquiring the state data of the radar equipment when receiving the echo signals, acquiring the influence range of the interference signals based on the state data of the radar equipment, and feeding back and reminding an operator to adjust the detection parameters of the radar equipment or adjust the reconnaissance path of the reconnaissance car.
It is noted that, herein, relational terms such as first and second, and the like may be used solely to distinguish one entity or action from another entity or action without necessarily requiring or implying any actual such relationship or order between such entities or actions. Also, the terms "comprises," "comprising," or any other variation thereof, are intended to cover a non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements does not include only those elements but may include other elements not expressly listed or inherent to such process, method, article, or apparatus.
Finally, it should be noted that: although the present invention has been described in detail with reference to the foregoing embodiments, it will be apparent to those skilled in the art that changes may be made in the embodiments and/or equivalents thereof without departing from the spirit and scope of the invention. Any modification, equivalent replacement, or improvement made within the spirit and principle of the present invention should be included in the protection scope of the present invention.
Claims (9)
1. A method for channel interference signal identification guidance, the method comprising:
step S100: controlling a scout car, performing suspicious target detection on a target detection area by utilizing radar equipment on the scout car, receiving all suspicious echo signals in the target detection area, and performing preliminary inspection and investigation on whether the radar equipment is subjected to deceptive interference in the target detection area based on state data of the radar equipment; if the preliminary inspection and the investigation result show that the radar equipment is subjected to deceptive interference in the target detection area, turning to the step S200;
step S200: performing preliminary judgment of deceptive interference on all suspicious echo signals based on distribution information of the suspicious echo signals on a two-dimensional plane, respectively obtaining echo signals with deceptive interference influence and echo signals without deceptive interference influence, and turning to the step S300;
step S300: analyzing historical detection data of radar equipment, and respectively searching for indicative indexes of positive correlation fixed accompanying connection or negative correlation fixed accompanying connection existing between the radar equipment and each detection target; the indicative indexes which are positively correlated and fixed and concomitantly linked with the detection targets refer to characteristic environment indexes matched with the detection targets; the indicative indexes which are in negative correlation and fixed accompanying connection with the detection targets refer to characteristic environment indexes which are not matched with the detection targets;
step S400: processing and identifying a plurality of echo signals with the deceptive interference influence detected in the step S200 to obtain target information corresponding to each echo signal; the target information comprises target category information, target-to-radar distance information, target radial velocity information, target azimuth information and target height information; verifying the influence of the deceptive interference on the plurality of echo signals based on the accompanying conditions of the indicative indexes of the respective corresponding targets;
step S500: collecting echo signals of which the check results show that deception jamming influence really exists, correspondingly acquiring state data of the radar equipment when the echo signals are received, acquiring the influence range of the jamming signals based on the state data of the radar equipment, and feeding back and reminding an operator to adjust detection parameters of the radar equipment.
2. The method for guiding channel interference signal identification according to claim 1, wherein the step S100 of performing preliminary checking and troubleshooting on whether the radar device is fraudulently interfered in the target detection area based on the state data of the radar device comprises:
step S101: acquiring a radar device atAll target echo signals received in a target detection area are regarded as suspicious echo signals; sequencing all suspicious echo signals according to echo receiving time to obtain a sequence set { t ] when receiving echoes 1 ，t 2 ，…，t n The corresponding suspicious echo signal ordered set { S } 1 ，S 2 ，…，S n }; wherein S is 1 ，S 2 ，…，S n Respectively indicating radar devices at t 1 ，t 2 ，…，t n Receiving 1 st, 2 nd, … th and n th suspicious echo signals at the time of receiving; calculating an average target detection rate of radar devices within the target detection area
Step S102: respectively and correspondingly acquiring state data US of radar equipment on the scout car when the ith suspicious echo signal is obtained i (ii) a Said status data US i The method comprises the steps of scanning angle information of radar antenna beams when the radar equipment receives an ith suspicious echo signal, and position information of a scout car when the radar equipment receives the ith suspicious echo signal; respectively acquiring the sequence set S of suspicious echo signals 1 ，S 2 ，…，S n Within }, the state change data US corresponding to each two adjacent suspicious echo signals i -US i-1 (ii) a Calculating an average rate of change of state of the radar device within the target detection area:
calculating an average concomitant target detection rate obtained as the radar average device detection state changes:
P 3 ＝P 2 /P 1
step S103: when the obtained average target detection rate P 1 Greater than the average target detection rate threshold preset by the system and average associated target detection rate P 3 Greater than system advanceAnd (4) setting an average accompanying target detection rate threshold value, and judging that the primary detection and investigation result is that the radar equipment is subjected to deceptive interference in the current target detection area.
3. The method as claimed in claim 1, wherein the step S200 of preliminary determining fraudulent interference of all suspected echo signals includes:
step S201: respectively acquiring all suspicious echo signals received by radar equipment in a target detection area, respectively taking a signal data point of each suspicious echo signal as a starting point, and respectively dividing each suspicious echo signal into a plurality of data sections with the length equal to the width of a radar emission pulse;
step S202: respectively calculating an information dimension x in each data segment in each suspicious echo signal, respectively calculating an information dimension y of a signal envelope of each data segment in each suspicious echo signal, and acquiring a difference value R between the two information dimensions y-x; obtaining the maximum R value obtained when the target echo exists independently and no interference echo exists from the historical detection data of the radar equipment, and recording the maximum R value as R max Satisfies the condition of mu > R max Setting an interference detection threshold mu;
step S203: when a certain suspicious echo signal R is larger than mu, preliminarily judging that deceptive interference exists in the certain suspicious echo signal; when a certain suspicious echo signal R is less than or equal to mu, preliminarily judging that no deceptive interference exists in the certain suspicious echo signal;
step S204: and finishing preliminary judgment of the deception jamming influence on all the suspicious echo signals, classifying all the suspicious echo signals, and respectively obtaining the echo signals with the deception jamming influence and the echo signals without the deception jamming influence.
4. The method according to claim 1, wherein the step S300 of analyzing the historical probe data of the radar device to find the indicator indicating whether there is a positive or negative correlation fixed accompanying relationship with each probe target comprises:
step S301: acquiring an accompanying characteristic environment index when a certain target a is detected by radar equipment in a historical manner; the companion feature environment indicator comprises a set of terms { r } 1 ，r 2 ，r 3 ，r 4 ，r 5 A } is sent to the central processing unit; wherein r is 1 The altitude range of the terrain in which a is located; r is 2 The attribute of the building facility within the distance threshold value range from the a is obtained; r is 3 Is the attribute of the moving object within the range of the distance threshold value from a; r is 4 Is the landform of the area where a is located; r is 5 The climate of the area where a is located;
step S302: in the radar equipment historical detection record, a target a and a jth accompanying characteristic environment index r j The combination occurs as an independent instance { a, r } j }; wherein r is j ∈{r 1 ，r 2 ，r 3 ，r 4 ，r 5 B, }; calculate each independent instance { a, r } j Frequency of occurrence:
wherein, N { a, r j Indicates the target a and the j-th adjoint characteristic environment index r j The total number of instances of independent instances that occur in combination; n is a radical of a Representing the total number of times of detecting the object a in the radar device historical detection record;
step S303: in the historical detection record of the radar equipment, the target a is detected and the detection result is displayed to be correct, and the jth accompanying characteristic environment index r j Cases occurring in combination as an independent instance { a, r j True }; calculate each independent case { a, r } j True } frequency of occurrence:
wherein N { a, t } represents the total number of instances of the independent instance { a, t }; n is a radical of a Representing the total number of times of detecting the object a in the radar device historical detection record;
step S304: computing independent cases { a, r j And independent cases { a, r } j Value of the companion relationship between true }:
wherein, N [ { a, r j }∪{a，r j ，true}]Representing independent instances { a, r j And independent cases { a, r } j True } total number of co-occurrences; if it is
Judging that no fixed accompanying relation exists between the independent case { a, r, t } and the independent case { a, r }, if so
Determine independent instances { a, r j And independent cases { a, r } j True-correlation fixed concomitant relation exists between true, namely, when the target a is detected, a characteristic environment index rj accompanied with the target a is an indicative index for displaying the correct detection result; if it is
Judging independent cases { a, r } j And independent cases { a, r } j True } there is a fixed association of negative correlation, i.e. whenever an object a is detected, a characteristic environment indicator r associated with the object a appears j To display an indicator of the error of the detection result.
5. The method as claimed in claim 4, wherein the step S400 of performing a deceptive jamming impact verification process on the echo signals based on the accompanying condition of the indicative indicator of each corresponding target includes:
step S401: determining specific positions corresponding to the targets in a target detection area based on target information corresponding to the suspicious echo signals, and respectively acquiring accompanying characteristic environment indexes of the targets at the specific positions;
step S402: if an indicative index presenting a negative correlation fixed incidental relation with the target or an indicative index not presenting a positive correlation fixed incidental relation with the target appears in the incidental characteristic environment indexes of the target at the specific position, the verification result shows that the suspicious echo signal corresponding to the target really has deceptive interference influence.
6. The method as claimed in claim 2, wherein the step S500 comprises:
step S501: respectively acquiring a plurality of corresponding state data when the radar equipment receives an echo signal which is shown by a verification result and really has a deceptive interference influence; based on the state data, acquiring a scanning angle range of a radar antenna beam and a position range of a scout car when the radar equipment receives an echo signal which shows that the check result really has the influence of deceptive interference;
step S502: and feeding back the scanning angle range of the radar antenna beam and the spatial region range formed by the position range of the reconnaissance car to an operator, reminding the operator to reconnaissance the spatial region range again, and adjusting the detection parameters of the radar equipment before reconnaissance again.
7. A channel interference signal recognition guidance system applied to the channel interference signal recognition guidance method according to any one of claims 1 to 6, the system comprising: the device comprises a suspicious echo signal receiving module, a deceptive interference preliminary examination and troubleshooting module, a deceptive interference preliminary judgment module, a historical detection data analysis module, a deceptive interference influence verification module and a guide feedback module;
the suspicious echo signal receiving module is used for controlling a scout car, detecting suspicious targets in a target detection area by utilizing radar equipment on the scout car and receiving all suspicious echo signals in the target detection area;
the deception jamming preliminary inspection and troubleshooting module is used for acquiring state data of the radar equipment and preliminarily inspecting and troubleshooting whether the radar equipment is deception jamming in the target detection area;
the deception jamming preliminary judgment module is used for receiving the data in the suspicious echo signal receiving module and carrying out preliminary judgment on deception jamming on all suspicious echo signals based on the distribution information of the suspicious echo signals on a two-dimensional plane;
the historical detection data analysis module is used for analyzing the historical detection data of the radar equipment and respectively searching for an indicative index of positive correlation fixed accompanying connection or negative correlation fixed accompanying connection existing between the historical detection data and each detection target; the indicative indexes which are positively correlated and fixed and concomitantly linked with the detection targets refer to characteristic environment indexes matched with the detection targets; the indicative indexes which are in negative correlation and fixed accompanying connection with the detection targets refer to characteristic environment indexes which are not matched with the detection targets;
the deception jamming influence checking module is used for receiving the data in the deception jamming preliminary judgment module, and processing and identifying a plurality of echo signals with deception jamming influences detected to obtain target information corresponding to each echo signal; acquiring the accompanying conditions of the plurality of echo signals based on the indicative indexes of the respective corresponding targets, and verifying the influence of the deceptive interference;
the guiding feedback module is used for receiving the data in the deception jamming influence checking module, collecting echo signals of which checking results show that deception jamming influences really exist, correspondingly acquiring state data of the radar equipment when the echo signals are received, acquiring the influence range of the jamming signals based on the state data of the radar equipment, and feeding back and reminding an operator to adjust detection parameters of the radar equipment or adjust a reconnaissance path of the reconnaissance vehicle.
8. The channel interference signal identification guidance system according to claim 7, wherein the suspected echo signal receiving module comprises a first calculating unit, a second calculating unit, and a third calculating unit;
the first calculation unit is used for calculating the average target detection rate of the radar equipment in the target detection area;
the second calculation unit is used for calculating the average state change rate of the radar device in the target detection area;
the third calculating unit is used for calculating the average accompanying target detection rate obtained along with the change of the radar average device detection state.
9. The channel interference signal identification guidance system according to claim 7, wherein the historical detection data analysis module comprises an adjoint value calculation unit, an indicative index analysis unit;
the accompanying relation value calculating unit is used for calculating an accompanying relation value between each detection target and each accompanying characteristic environment index and judging a fixed accompanying relation between each detection target and each accompanying characteristic environment index according to the accompanying relation value;
the indicative index analyzing unit is used for receiving the data in the accompanying connection value calculating unit to obtain a plurality of indicative indexes which are in positive correlation fixed accompanying connection with each detection target and a plurality of indicative indexes which are in negative correlation fixed accompanying connection with each detection target.
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